RECOVERY OF TOXIC HEAVY METALS FROM CONTAMINATED WATER SUPPLIES USING PLANTS

使用工厂从受污染的供水中回收有毒重金属

• 批准号: 5211514
• 负责人: JORGE L GARDEA-TORRESDA
• 金额: --
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/5211514
• 关键词: atomic absorption spectrometry; cadmium; chemical binding; chromium; copper; electrochemistry; electron microscopy; environmental toxicology; heavy metals; lead; luminescence; mercury; metal poisoning; nuclear magnetic resonance spectroscopy; physical separation; plants; polarography; water pollution; water pollution control; water supply

Accumulation of toxic heavy metal ions in water supplies is a matter of increasing health concern. Metal ions such as lead, copper, cadmium, mercury, chromium, and nickel cause acute and chronic illnesses in humans and other animals. At the present time, development of low cost and highly effective methods for the removal of toxic heavy metal ions from waters is of great health importance. We propose to study the metal binding properties of biologically-derived materials that are currently present in large quantities in the southwestern part of the united Stats. Some of the biological materials selected grow around smelters and in the heavy metal- rich tailings of abandoned mines, areas where few other plants will survive. Thus, these plants may be biologically adapted to bind metal ions. Four concurrent areas of research will be active. 1) Study of the toxic heavy metal ion binding properties of Russian thistle (Salsola species). Larrea divaricata (creosote bush), and Sphagnum peat moss. 2). Use of spectroscopic and electrochemical techniques as well as chemical modification methods to investigate the mechanism of metal ion binding to the biomaterial. 3) Study of silica-based and alginate-based cell immobilization techniques in order to use the biomaterial in columns under flow conditions. 4). Examine the possibility of purifying local water supplies contaminated with heavy metal ions by using the immobilized biological materials. The long term goal of this research is to understand the mechanisms of toxic metal ion binding to the biological materials and consequently, this understanding will enable the optimization of toxic metal removal from contaminated waters using biologically derived materials. Thus, the proposed research has a direct relevance upon environmental health.

有毒重金属离子在供水中的积累是一个问题 人们对健康的担忧日益加剧。金属离子，如铅、铜、镉、 汞、铬和镍会引起人类的急慢性疾病。 和其他动物。目前，低成本和高成本的发展 去除水体中有毒重金属离子的有效方法是 对健康非常重要。我们建议研究金属结合 生物衍生材料的性质，目前存在于 大量出现在美国西南部。其中一些 精选的生物材料生长在冶炼厂周围和重金属中- 废弃矿山的丰富尾矿，其他工厂很少的地区 活下来。因此，这些植物可能在生物上适应于结合金属。 离子。四个同时进行的研究领域将是活跃的。1)研究 俄罗斯蓟(Salsola)有毒重金属离子结合特性 物种)。和泥炭藓(Sphagnum泥炭苔藓)。2)。 使用光谱和电化学技术以及化学 研究金属离子与金属离子结合机理的修饰方法 生物材料。3)硅基和海藻酸盐基电池的研究 固定化技术以便在柱中使用生物材料 流动条件。4)。研究净化当地水的可能性 使用固定化的金属离子污染的供应品 生物材料。这项研究的长期目标是了解 有毒金属离子与生物材料结合的机理 因此，这一认识将使有毒物质的优化 利用生物衍生技术去除受污染水体中的金属 材料。因此，拟议的研究与以下方面直接相关 环境健康。